1.one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
2.any of the main branches arising from the trunk or a bough of a tree
3.(astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet
4.either of the two halves of a bow from handle to tip;
the upper limb of the bow
5.the graduated arc that is attached to an instrument for measuring angles;
the limb of the sextant
6.any projection that is thought to resemble an arm;
the arm of the record player